George seagrave



G. SEAGRAVE.

- Oar-Lamp. No. 228,402. Patented Junel, 1880.

1 I" i I E] E3 [21 1" H r K1 Q I v 014mm UNITED STATES To all whom it may concern:

Be it known that I, GEORGE SEAGRAVE, a subject of the Queen of Great Britain and Ireland, and a resident of London, county of Mid- 5 dlesex, England, have invented certain Improvements in Lamps, of which the following is a specification.

My invention relates to certain improvements in the construction of lamps which are more especially adapted for suspension from the roofs of railway-cars; and the object of my invention is to so construct the lamp as to allow the reservoir to be easily filled, while at the same time the oil is prevented from splashing when the lamp is moved about.

My invention relates to other minor features of construction, too fully described hereinafter to need preliminary description.

In the accompanying drawings, Figure l is a vertical section of my improved lamp; Fig. 1, a detached view of a modified form of a portion of the lamp-casing; Figs. 2, 3, and 4, diagrams of proposed forms of wick-tube tops; Figs. 5 and 6, views of devices for retaining the wick-raiser in position Fig. 7 a view of the key for operating the wick-raising spindle and the retaining-screw for the oil-cup; and Figs. 8 and 9, views of the double-wick tube I prefer to use with this lamp.

The oil-reservoir A, to which the burner B and wick-tube are adapted to be connected by means of a bayonet-joint, a, is screwed to the portion of the body of thelamp,and secured by a screw, 1, provided with a squared head for the reception of a key, Fig. 7 by which alone it can be turned ,to allow the oil-reservoir to be removed. To a flange, d, on the upper part of the reservoir is secured a pendent funnel, b, which dips into the oil and prevents it from splashing when the lamp is moved about. In order to enable the reservoir to be easilyfllled and emptied, however, an air-opening, d, is provided in the flange 61.

The upper portion of the part 0 forms a chamber for the burner B, to which air is supplied through the tubes D, extending up into the body of the casing tubes is made in two being attached to the E. Each of these parts, the lower part, 0, bottom f of the casing EPATENT OFFICE.

GEORGE SEAGRAVE, OF LONDON, ENGLAND, ASSIGNOR TO ALEXANDER KELLY, OF SAME PLACE.

CAR-LAM P.

SPEGIFIGATION forming part of Letters Patent No. 228,402, dated June 1, 1880. Application filed May 5, 1879.

by screw-threads and nuts g 9, while the upper part, 6, is tapped at its lower end and screwed to the lower part, 0, so that facility is afforded for cleaning by simply unscrewing the upper part, 6, without disturbing the lower parts.

The pipes D are perforated at their upper ends, or carry perforated caps h, and project above the annular flanged plate *5, secured to the casing E. Air is supplied to the interior of the lamp through perforations k k in the casing, and also through the perforated dome F near the top of the lamp. This dome rests on a tube, N, forming an extension of the up per portion, E, of the casing, which is hinged at s to the main portion of the casing. Above the dome F is a hood, M, resting on supports r,and on the top of this hood is a hinged lid, M, connected to the dome F, so as to lift the latter with it when it is raised. Baffleplates in, Flg. 1, may be arranged about the openings 70 in the sides of the casing.

The bottom f of the casing, arranged at an angle in respect to the sides, is utilized as a reflecting-surface, and may be combined with other reflectors around the casing, arranged at any desired angle.

Above the burner B is the usual cone G on the annular rim m, provided with a ring of yielding material, on which rests the glass globe H. Above the globe is a metal chimney, I, extending to the top of the lamp, and secured to an outer cylinder, K, the lowerend of which is provided with a screw-ring, n, for securing it to the body of the casing.

For a burner I prefer to use the double wicktube 00 00, (shown in Figs.8and9,) the spindles for raising the wicks a being geared together by gear-wheels '0 on the spindles, the ends of which are squared, so that they can be turned only on the application of a key such as that shown in Fig. 7. Between the two wick-tubes, at the upper part thereof, I arrange a trough, 'w, for the reception of any partially-coinlensed vapor, by the combustion of which the power of the combined flame of the two wicks will be greatly augmented. I prefer to interpose between the two wick-tubes also some material which is a non-conductor of heat.

To increase the brilliancy of the flame the top of the wicktube may be made convex, as indicated in Fig. 2, concave, as shown in Fig. 3, or otherwise curved, as shown in Fig. 4.

In order to permit the wick to be always raised to the desired height, and to be retained in that position after adjustment, so as not to be affected by any shocks o1- jars imparted to the lamp, I secure to one of the wick-raising spindles a toothed wheel, q, Figs. 5 and 6, into which gears a worm, p,.having a squared head adapted to be operated by the key, Fig. 7 so that when the wick has once been raised to the proper position it is retained there, and consequently the glass globe is not liable to be broken or cracked by undue height of the flame.

I claim as my invention- 7 1. An oil-reservoir for lamps provided with afunnel, b, and upper flange, (1, having an opening, (1, substantially as and for the purpose specified.

2. The combination of the bottom f of the lamp-casing with the air-tubes, each in two parts, screw-threaded, and provided with nuts 9 g, as set forth.

3. The combination of the upper part of the lamp-casing, having a tube, N, with a detachable perforated dome and hood, provided with a hinged lid connected to said dome, all sub stantially as described.

In witness whereof I have signed my name to this specification in the presence of two subscribing witnesses.

GEO. SEAGRAVE.

Witnesses:

FREDK. U. DYER,

CHARLES MILLs, Both of 47 Lincolns Inn Fields, London. 

